ex/ex_abbrev.c

   1 /*-
   2  * Copyright (c) 1992, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   5  *      Keith Bostic.  All rights reserved.
   6  *
   7  * See the LICENSE file for redistribution information.
   8  */
   9
  10 #include "config.h"
  11
  12 #ifndef lint
  13 static const char sccsid[] = "$Id: ex_abbrev.c,v 10.10 2001/12/16 18:18:54 skimo Exp $ (Berkeley) $Date: 2001/12/16 18:18:54 $";
  14 #endif /* not lint */
  15
  16 #include <sys/types.h>
  17 #include <sys/queue.h>
  18 #include <sys/time.h>
  19
  20 #include <bitstring.h>
  21 #include <ctype.h>
  22 #include <limits.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "../common/common.h"
  28 #include "../vi/vi.h"
  29
  30 /*
  31  * ex_abbr -- :abbreviate [key replacement]
  32  *      Create an abbreviation or display abbreviations.
  33  *
  34  * PUBLIC: int ex_abbr __P((SCR *, EXCMD *));
  35  */
  36 int
  37 ex_abbr(SCR *sp, EXCMD *cmdp)
  38 {
  39         CHAR_T *p;
  40         size_t len;
  41
  42         switch (cmdp->argc) {
  43         case 0:
  44                 if (seq_dump(sp, SEQ_ABBREV, 0) == 0)
  45                         msgq(sp, M_INFO, "105|No abbreviations to display");
  46                 return (0);
  47         case 2:
  48                 break;
  49         default:
  50                 abort();
  51         }
  52
  53         /*
  54          * Check for illegal characters.
  55          *
  56          * !!!
  57          * Another fun one, historically.  See vi/v_ntext.c:txt_abbrev() for
  58          * details.  The bottom line is that all abbreviations have to end
  59          * with a "word" character, because it's the transition from word to
  60          * non-word characters that triggers the test for an abbreviation.  In
  61          * addition, because of the way the test is done, there can't be any
  62          * transitions from word to non-word character (or vice-versa) other
  63          * than between the next-to-last and last characters of the string,
  64          * and there can't be any <blank> characters.  Warn the user.
  65          */
  66         if (!inword(cmdp->argv[0]->bp[cmdp->argv[0]->len - 1])) {
  67                 msgq(sp, M_ERR,
  68                     "106|Abbreviations must end with a \"word\" character");
  69                         return (1);
  70         }
  71         for (p = cmdp->argv[0]->bp; *p != '\0'; ++p)
  72                 if (ISBLANK(p[0])) {
  73                         msgq(sp, M_ERR,
  74                             "107|Abbreviations may not contain tabs or spaces");
  75                         return (1);
  76                 }
  77         if (cmdp->argv[0]->len > 2)
  78                 for (p = cmdp->argv[0]->bp,
  79                     len = cmdp->argv[0]->len - 2; len; --len, ++p)
  80                         if (inword(p[0]) != inword(p[1])) {
  81                                 msgq(sp, M_ERR,
  82 "108|Abbreviations may not mix word/non-word characters, except at the end");
  83                                 return (1);
  84                         }
  85
  86         if (seq_set(sp, NULL, 0, cmdp->argv[0]->bp, cmdp->argv[0]->len,
  87             cmdp->argv[1]->bp, cmdp->argv[1]->len, SEQ_ABBREV, SEQ_USERDEF))
  88                 return (1);
  89
  90         F_SET(sp->gp, G_ABBREV);
  91         return (0);
  92 }
  93
  94 /*
  95  * ex_unabbr -- :unabbreviate key
  96  *      Delete an abbreviation.
  97  *
  98  * PUBLIC: int ex_unabbr __P((SCR *, EXCMD *));
  99  */
 100 int
 101 ex_unabbr(SCR *sp, EXCMD *cmdp)
 102 {
 103         ARGS *ap;
 104
 105         ap = cmdp->argv[0];
 106         if (!F_ISSET(sp->gp, G_ABBREV) ||
 107             seq_delete(sp, ap->bp, ap->len, SEQ_ABBREV)) {
 108                 msgq_wstr(sp, M_ERR, ap->bp,
 109                     "109|\"%s\" is not an abbreviation");
 110                 return (1);
 111         }
 112         return (0);
 113 }